They would cluck and cackle at each other when shifting around on the roost (sometimes, a bossier hen wouldn't like where she had ended up and would proceed to climb OVER the others and shove them around to get a better spot). The "Ba-GAWK-buck-buck-buck..." and growling noises seemed to be more complaining.

When they were all settled, they would make a sweet sound a lot of chicken owners describe as singing. This is supposedly a sound of happiness and contentment. Sometimes the rooster would cluck quietly to the hens, and they would answer him. I sort of imagined they were like a loving husband and wife (er, wives) having a conversation about their day...